Proflow Cylinder Heads, SuperMax 360 , Aluminium, Assembled 120cc Chamber, Strai

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Proflow Cylinder Heads, SuperMax 360, Aluminium, BB Chevrolet, Assembled Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. This BBC cylinder head is recommended for agressive street or street/strip applications with displacements up to 540 cubic inches, operating at or below 6800 RPM. 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift. Specifications & Features:MaterialA356.2 AluminumIntake Port Volume360ccIntake seat size2.3Exhaust seat size1.88Intake Port Dimension2.515"H x 1.780"W x 11/32 RadiusIntake Port LocationStockExhaust Port Volume135ccExhaust Port Dimension1.780"H x 2.025" WExhaust Port Location.375" RaisedCombustion Chamber Size121ccValve Cover Bolt PatternPerimeter BoltValve Angle24°/4° Int, 15°/4° ExhValve Spring Pocket Diameter1.725" O.DMax Valve Spring Pocket Machining1.750" O.DDeck Thickness.750"Minimum Bore Diameter4.250"Flat Mill.006" per cc/ Maximum 114ccAngle Mill.009" per cc/Maximum 104ccNote:Angle mills might require a .120" Thick intake gasket.Minimum Cross Sectional Area3.435 sq. in.Spark Plug Dimensions14mm x .750" w/Gasket SeatIntake Valve Seat Machine Style:5-angle 11/32" Intake Valve, 2.300" x5.500" O.A.L 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600 10° Titanium Retainers 1.490" O.D x 1.180" I.D x .765" I.D 10° 11/32" Valve Locks with lashcap recess ARP 7/16" Rocker Exhaust Studs ARP 7/16" Rocker Intake Studs 3/8" Guide Plates 11/32" Viton Valve Seals Hardened Spring Cup 1.740" O.D / 1.650" I.D Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L Recommended Components:Intake Port Gasket (.120" Thick)Intake Port Gasket (.060" Thick)Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.Exhaust Port Gasket Head Gasket, Fel-Pro #1047 (Mark V and VI) Head Gasket,, Fel-Pro #1017-1 (Mark IV) Head Bolts, ARP 135-3703 (Mark IV) Head Bolts, ARP 135-3707 (Mark V) Head Studs, ARP 235-4713 Head Bolt Washers, Manley Stud Girdle 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) 1.7 Shaft Mount Rocker Arms T&D Suggested ManifoldVictor JrSuggested ManifoldSuper VictorSpark Plug Starting RangePump Gas 3924 / Race Gas 3922